FROM debian:buster-slim
LABEL maintainer "Mauro Torrez <mauro@mau.ro>"
ARG DEBIAN_FRONTEND=noninteractive
ENV LC_ALL C
RUN echo "_dev_null: /dev/null" > /etc/aliases \
  && apt-get update && apt-get install -y --no-install-recommends \
	postfix \
	postfix-pcre \
	postfix-ldap \
	postfix-sqlite \
	libsasl2-modules \
	ssl-cert \
	&& rm -rf /var/lib/apt/lists/* \
	&& cp /usr/share/postfix/main.cf.debian /etc/postfix/main.cf \
	&& mkdir -p /ssl && chmod 700 /ssl \
  && cp /etc/ssl/certs/ssl-cert-snakeoil.pem /ssl/cert.pem \
  && cp /etc/ssl/private/ssl-cert-snakeoil.key /ssl/key.pem

VOLUME /etc/postfix /ssl
CMD postfix start-fg